Good battery, crank but no start.

[grsthegreat]

I’ve never seen a modern diesel tractor without glow plugs?

 

[etpm]

Once again a no start condition turns out to be a bad ground. Really, when the no starter motor activation condition occurs the first thing to do should be to remove the negative cable from the frame, clean the frame and the cable lug to bright metal, re-attach the ground cable lug, and try starting. Especially if the problem occurs suddenly.
Eric

 

[Little Red Tractor]

I may have missed a piece of this but, if it is now turning over, and if it starts and runs with starter fluid or WD 40, but won't continue to run, it sounds like a fuel supply issue. Could be water, a plugged filter, a failed pump, a failed shut-off mechanism (unknown if that's a manual fuel shut-off or a solenoid).
Service manuals are apparently available: Long 350 Tractor - Service Manual

 

[RiversideFarm]

I’ve never seen a modern diesel tractor without glow plugs?

I have a 2001 New Holland and a 2007 JD both over 60 hp. No glow plugs on either, block heater on the JD and fuel heater on the NH.

 

[uncle888]

I have a similar tractor to yours, mine is a 1975 model. If you have a lever type start switch, the glow plug is activated by turning it clockwise. You can also start the engine, without the glow plug, by turning the switch anti clockwise.

 

[yoppeh7j]

In my 80 plus years I never have seen a diesel that would not start at 40 to 50 degrees unless the starter was turning too slow or the fuel injection was messed up or the air filter was plugged. From the sound in the second video I think you still have electral problems with the starter. Maybe not enough voltage at the starter from bad connections. Clean all them from the starter to the battery including the starter to the engine. You may have the starter starting to drag. Maybe a new starter if problem continue.

 

[Tx Jim]

I’ve never seen a modern diesel tractor without glow plugs?

There are many diesel engines built today that have no glow-plugs, JD 2.9L/179 cid, 4.5L/276 cid & 6.8L/414 cid are prime examples. These engine are used in many JD tractors currently being manufactured today.

 

[MelroseFred]

Was able to get the starter off and bench (ground) test it:

Bench test

Any thoughts on the state of the starter?

 

[Eagle1]

Does not look like it ever turns. The solenoid kicks the gear out into flywheel but nothing you did turned the starter motor. Not gonna start without some motion but you may not have applied enough power with that connection.
Plug the hot to the solenoid then use a smaller jumper to energize the solenoid to see if the contacts make a solid connection and actually turn the motor. If the motor does not turn time to see why (corrosion, bearing or ?) or replace.

 

[Tx Jim]

In video when positive battery jump cable was attached to large post that's connected to field coils on starter frame if appears that field coils, armature &/or brushes are faulty due to no rotation of armature.

When bench testing a starter one needs to attach ground cable to starter frame as shown in video then attach positive cable to large post on solenoid that larger tractor battery cable was attached to. Then using a screwdriver short across large post & smaller post on solenoid normally marked with an "S". In lieu of screwdriver one can use a "remote start switch" if available.